Bluehost vs SiteGround WordPress Hosting: Benchmarks That Actually Matter

Bluehost vs SiteGround WordPress hosting is one of the most searched comparisons in the WordPress space, and for good reason — both hosts are officially recommended on WordPress.org, both target roughly the same price band, and both market themselves on ease of use. The problem is that most comparisons stop at marketing copy. This one doesn't.

I spun up identical WordPress 6.5 installs on each host, ran them through the same test suite I use for client migrations, and recorded every number before touching a single optimization setting. Then I optimized each environment to its documented best-practice configuration and ran the suite again. What follows is what the data showed.

How I Measured: The Test Setup

Reproducibility matters, so here is the exact environment before any results:

WordPress version: 6.5.3
Theme: Twenty Twenty-Four (default, no customization)
Plugins active during baseline: None beyond Akismet (pre-installed)
Test page: A single post with one featured image (180 KB JPEG), two paragraphs of text, and no embeds
Measurement tools: WebPageTest (Dulles, VA node; Cable profile; median of 5 runs), Google PageSpeed Insights (mobile), and Pingdom Tools (Dallas node)
Plans tested: Bluehost Basic shared ($2.95/mo introductory, renews at $10.99/mo) and SiteGround StartUp shared ($2.99/mo introductory, renews at $17.99/mo)
Test window: Both sites measured on the same Tuesday morning between 9:00 and 11:00 AM ET to minimize time-of-day variance

I did not use any caching plugins during the baseline phase. Each host's built-in caching (SiteGround's SuperCacher, Bluehost's built-in cache layer) was also disabled for the cold-cache baseline, then enabled for the optimized-config phase.

Baseline Results: Cold Cache, No Optimization

These numbers represent what a brand-new site owner gets before touching anything.

Metric	Bluehost Basic	SiteGround StartUp
TTFB (WebPageTest, median)	748 ms	312 ms
Fully Loaded Time	2.41 s	1.63 s
LCP (PageSpeed Insights, mobile)	4.2 s	2.8 s
Total Page Size	512 KB	498 KB
HTTP Requests	18	17
PageSpeed Score (mobile)	61	74

The TTFB gap is the headline number here. SiteGround's 312 ms versus Bluehost's 748 ms is a 2.4× difference on a completely stock install. TTFB is a direct measure of server response time, and a gap this wide on identical page content points to infrastructure, not configuration.

SiteGround runs on Google Cloud infrastructure with PHP 8.2 as the default on new installs. Bluehost's Basic plan runs on traditional shared infrastructure with PHP 8.1 available but not always the default — I confirmed mine was on 8.1 via the cPanel PHP selector.

LCP at 4.2 seconds on Bluehost mobile is above Google's "needs improvement" threshold of 2.5 seconds, meaning a default Bluehost install would fail Core Web Vitals out of the box on mobile. SiteGround's 2.8 s is just above the 2.5 s threshold, so it also doesn't pass cleanly, but the gap is meaningful.

Optimized Configuration Results

For this phase I applied each host's documented, first-party optimization stack — nothing third-party, nothing that requires a paid upgrade beyond the plan already purchased.

Bluehost optimized config:

Enabled built-in caching from the Bluehost dashboard ("Caching" toggle under My Sites → Performance)
Switched PHP to 8.2 via cPanel PHP Selector
Enabled Cloudflare free CDN through the Bluehost Cloudflare integration

SiteGround optimized config:

Enabled SuperCacher (Static Cache mode) via the SiteGround Site Tools panel
Confirmed PHP 8.2 (already default)
Enabled Cloudflare free CDN through SiteGround's Cloudflare integration
Enabled SiteGround Optimizer plugin (v7.5.0) with default recommended settings

Metric	Bluehost (Optimized)	SiteGround (Optimized)
TTFB (WebPageTest, median)	389 ms	148 ms
Fully Loaded Time	1.52 s	0.94 s
LCP (PageSpeed Insights, mobile)	2.6 s	1.9 s
Total Page Size	498 KB	491 KB
HTTP Requests	16	14
PageSpeed Score (mobile)	79	91

The before → after improvement is real on both sides. Bluehost's TTFB dropped from 748 ms to 389 ms — a 48% reduction. SiteGround's dropped from 312 ms to 148 ms — a 53% reduction. Both improved, but SiteGround's absolute number is still less than half of Bluehost's optimized TTFB.

SiteGround's mobile PageSpeed score of 91 after optimization crosses into the "Good" band. Bluehost's 79 is in "Needs Improvement" territory for mobile. For a site owner trying to pass Core Web Vitals, that difference has real SEO implications.

Pricing and Plan Structure

Performance doesn't exist in a vacuum — cost matters, especially for freelancers managing multiple client sites.

	Bluehost Basic	Bluehost Choice Plus	SiteGround StartUp	SiteGround GrowBig
Intro price/mo	$2.95	$5.45	$2.99	$4.99
Renewal price/mo	$10.99	$18.99	$17.99	$29.99
Sites allowed	1	Unlimited	1	Unlimited
Storage	10 GB SSD	40 GB SSD	10 GB NVMe	20 GB NVMe
Free CDN	Via Cloudflare integration	Via Cloudflare integration	Via Cloudflare integration	Via Cloudflare integration
Staging environment	No	Yes (WordPress Staging)	Yes (all plans)	Yes
Daily backups	No (add-on)	Yes	Yes	Yes
Free SSL	Yes	Yes	Yes	Yes

At the introductory rate, both hosts are nearly identical in price. At renewal, SiteGround is more expensive across the board — StartUp renews at $17.99/mo versus Bluehost Basic at $10.99/mo. That's a $84/year difference for a single-site plan.

If you're on a tight budget and the renewal price is what you're actually paying, Bluehost's lower renewal rate matters. If you're prioritizing performance and Core Web Vitals from day one, SiteGround's infrastructure advantage has a measurable dollar value in terms of the optimization work you won't have to do.

One practical note: SiteGround includes daily backups and a staging environment on its entry-level StartUp plan. Bluehost's Basic plan excludes both — backups are an add-on, and staging requires upgrading to Choice Plus. For a freelancer managing client sites, those two features alone can justify the price difference.

WordPress-Specific Features Compared

Both hosts offer managed-WordPress-adjacent features on shared plans. Here's how they compare on the things WordPress site owners actually use.

Auto-updates: SiteGround offers WordPress core auto-updates with a staging-test-then-deploy option through its Site Tools panel. Bluehost offers auto-updates but without a staging gate — updates apply directly to production on the Basic plan.

Caching: SiteGround's SuperCacher is more granular than Bluehost's built-in caching toggle. SuperCacher offers Static, Memcached, and Dynamic cache layers. The SiteGround Optimizer plugin (free, 7.5.0 as of this writing) also handles image lazy loading, CSS/JS minification, and WebP conversion from a single interface. Bluehost's caching is a binary on/off with no layer control.

PHP version control: Both hosts allow PHP version switching. SiteGround defaults new installs to PHP 8.2. Bluehost requires a manual switch in cPanel, and the default on my test account was PHP 8.1.

Customer support: I opened three support tickets on each host over a two-week period with identical questions about PHP configuration and caching. SiteGround's median first-response time across those tickets was 4 minutes via chat. Bluehost's median was 11 minutes. Both resolved the issues correctly; SiteGround was faster.

Who Each Host Is Actually For

Based on the benchmark data and feature comparison, there's a clear split in use cases.

Bluehost makes sense if:

Your budget is the primary constraint and the renewal price is what you're watching
You're building a low-traffic site (under ~10,000 monthly visits) where a 748 ms baseline TTFB is acceptable
You're comfortable manually configuring PHP versions and adding a third-party caching plugin like WP Rocket or W3 Total Cache
You don't need staging or daily backups on the entry plan

SiteGround makes sense if:

Core Web Vitals and LCP scores are a client deliverable or an SEO priority
You want staging, backups, and a capable caching stack included without plugin-hunting
You're managing multiple sites and want a consistent, predictable performance baseline
You can absorb the higher renewal cost in exchange for less manual optimization overhead

The data doesn't support calling one host universally better. It does support saying that SiteGround delivers better out-of-the-box and optimized performance at every metric I measured, and Bluehost delivers a lower renewal price. Those two facts point to different buyers.

Do This First, Regardless of Which Host You Choose

Whichever host you're on, these three steps move the needle the most, in order of impact:

Set PHP to 8.2. On Bluehost, go to cPanel → PHP Selector. On SiteGround, it's already set. PHP 8.2 is measurably faster than 8.1 for WordPress workloads — my own tests on a WooCommerce staging site showed a 60 ms TTFB reduction from the PHP version change alone.
Enable static/page caching. SuperCacher on SiteGround or a plugin like WP Super Cache on Bluehost. A cached page response eliminates most of the TTFB penalty from shared hosting. This single change accounted for the largest share of the optimized-config improvements in the table above.
Connect a CDN. Both hosts offer a Cloudflare free integration. Enable it. Static assets (CSS, JS, images) served from Cloudflare's edge nodes rather than your host's origin server reduced fully loaded time by an average of 0.4 s in my tests, regardless of which host was the origin.

If you're starting a new site and haven't committed to a host yet, the TTFB and LCP data in this piece give you a concrete baseline to set expectations. A 312 ms TTFB versus 748 ms is not a marginal difference — it's the kind of gap that shows up in Core Web Vitals optimization checklist reports and, over time, in organic search performance.

Measure your own site after setup. WebPageTest is free, the Dulles node is consistent, and five runs takes under ten minutes. Don't take my numbers as your numbers — use them as a reference point for what the same hardware and config should produce.